Hi, Everyone,

You know how important sleep is.

Yet if you’re like many people, you’re either not getting enough—or you just don’t sleep well.

Sadly, I’ve been in that latter group for the past several months. 

And all of my typical sleep hacks—blue-light-blocking glasses, sauna, meditation, low-dose melatonin, L-theanine, etc.—just weren’t working. 

One of the things that makes the biggest difference in my sleep is keeping the bedroom cool. I wrote about the importance of this in my first book, The Paleo Cure

Research has shown that temperature can act as a sleep switch, triggering your brain to send signals to the rest of your body that it is time to go to sleep (and stay asleep). 

According to the National Sleep Foundation, the optimal temperature for sleep is between 60°F and 67°F (15°C to 19°C), and temperatures above 71°F (24°C) are likely to interfere with sleep quality.

In many parts of the world, even here where I live in temperate Berkeley, California, it’s difficult to maintain a temperature that low in the bedroom during a good chunk of the year (especially now, in the summer!) without air conditioning. 

Even if you have AC, a fair amount of your own body heat will be absorbed and reflected by your mattress—preventing your body temperature from dropping to the optimal level for sleep.

This is where OOLER comes in.

It consists of a mattress pad and control unit that circulates water throughout the microtubing in the pad, which can be cooled or heated anywhere from 55°F to 110°F.

And here’s the crucial thing to understand: Water is 25 times more effective than air at optimizing temperature. 

What’s more, cooling the surface of the bed—rather than the air in the bedroom—has a much greater impact on your core body temperature and is far more economical than cranking the AC up to get the ambient temp down to 60°F to 67°F, especially if you live in a hot climate!

OOLER has been a game-changer for my sleep.

No single diet, behavior, or lifestyle change—or supplement—has done more to improve both the quality and duration of my sleep.

In particular, it has nearly doubled the amount of deep sleep that I get

This is critical, since deep sleep is the most restorative form of sleep. It boosts the immune system, promotes tissue regeneration and DNA repair, and protects and rejuvenates the brain—which is the control center for optimal health.

I know from my Oura ring (a sleep tracking device) that I wasn’t getting enough deep sleep. I also know that this is true for many of my patients, family members, and employees because many of them wear Oura rings too!

OOLER changed that for me, and for virtually everyone I know that is using it.

It also might have saved my marriage. I’m joking, of course, but my wife and I could never agree on the temperature in the bedroom or the number of blankets or comforters on the bed. She prefers a warmer room and more covers; I want it cooler with fewer covers. 

Now I’ve got OOLER on my side of the bed, which maintains the perfect body temp for me—even with the air temperature and bed coverings that my wife prefers. 

It’s not often that I come across a product or technology that truly moves the needle. 

So much of what’s out there is just a gimmick. Or, in other cases, you might see an incremental effect. 

OOLER is one of those potentially life-changing products: it’s hard to overstate the value of high-quality sleep (especially deep sleep). I’d do or pay nearly anything to get it!

In fact, the only downside of OOLER for me is that I no longer want to travel and sleep in another bed! (I have seriously considered packing OOLER in another suitcase and bringing it with me on longer trips.)

I tell all of my patients, friends, family members—anyone who’ll listen!—about OOLER. But I realized the other day that I hadn’t told you about it! I’m remedying that now. 

The folks at Chili Technology are offering a 10 percent discount on OOLER for my tribe. Just use the discount code “DEEPSLEEP10” during checkout.

<<Click here to learn more about OOLER and order.>>

Sweet dreams!

In health,

P.S. They’re offering an even bigger discount (25 percent) on their legacy product, the chiliPAD. You can get that with the code “KRESSER25.” The chiliPAD is also great, but I prefer OOLER because it allows you to use an app to set different temperatures throughout the night. This is important because our body temperature naturally drops a few degrees by the early morning hours. So, I have it programmed to 64°F at bedtime, and then it rises to 66°F at 4:00 a.m. 

P.P.S. If you want to learn even more about the science behind these products and how temperature affects sleep, check out the podcast I recorded with Tara Youngblood, the cofounder of Chili Technology.